Went to gum clinic not an sti. said looks like it is eczema/ psoriasis. only responds to steroid cream but returns. what should i do next?

See Dr again: If the GUM/STI clinic says its not an STI, next step is to see your GP. Eczema or psoriasis often recur after steroid treatment. More likely to recur if there's a local yeast or bacterial infection (or skin products you use) irritating the skin too. See your Dr to review your treatment. In the meantime, avoid soap & use a bland moisturiser to protect your skin and reduce irritation. Good luck!